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Save and display listbox / comboBox items in Data Structure

Posted on 2008-06-15
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Last Modified: 2013-12-20
Hi,

I'm trying to save a collection of controls in a Data Structure, but I'm having a problem with listboxes and combo boxes. What would be the correct code for grabbing a selected item, saving it to file using a Data Structure and then displaying it again when that file is open again?
<VBFixedString(30)> Public Text3 As String
and
MD.Text3
are data items I use to save the contents of the listbox.

Any help much appreciated.

Cheers

MC
Public Structure MyData

        <VBFixedString(30)> Public Text1 As String

        <VBFixedString(30)> Public Text2 As String

        <VBFixedString(30)> Public Text3 As String

        Public Option1 As Boolean

        Public Option2 As Boolean

    End Structure
 

    Private Sub cmdSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdSave.Click

        Dim MD As New MyData

        MD.Text1 = TextBox2.Text

        MD.Text2 = TextBox3.Text

        MD.Text3 = ListBox1.SelectedItem

        MD.Option1 = Me.CheckBox1.Checked

        MD.Option2 = Me.RadioButton1.Checked

        FileOpen(1, txtFileName.Text, OpenMode.Random, OpenAccess.Write, OpenShare.Shared, Len(MD))

        FilePut(1, MD)

        FileClose(1)

    End Sub
 

    

    Private Sub cmdOpen_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdOpen.Click

        Dim MD As New MyData

        FileOpen(1, txtFileName.Text, OpenMode.Binary, OpenAccess.Read, OpenShare.Shared, Len(MD))

        FileGet(1, MD)

        FileClose(1)

        TextBox2.Text = MD.Text1

        TextBox3.Text = MD.Text2

        ListBox1.Text = MD.Text3

        CheckBox1.Checked = MD.Option1

        RadioButton1.Checked = MD.Option2

    End Sub

End Class

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Question by:MonteCristo33
  • 2
3 Comments
 
LVL 19

Accepted Solution

by:
elimesika earned 125 total points
ID: 21789607
HI

You should define a variable that holds the selected index and populate it in the SelectedIndexChanged event, then, you can refer to that index in your code.

See samples at http://www.startvbdotnet.com/controls/listbox.aspx
0
 

Author Comment

by:MonteCristo33
ID: 21795423
Dear Elimesika,

Thanks for your help. It made it all cristal clear, and above all, made it work.

MC
0
 

Author Closing Comment

by:MonteCristo33
ID: 31467385
Great stuff! clear and practical answer. Many thanks
0

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